Twitter thrived because it limited users to 140 characters, helping its signal-to-noise ratio -- but it simultaneously encouraged users to post frequently, writes Christopher Mims. A more elegant, less-noisy solution might be a social network that permitted users to post only once per day, forcing people to focus on quality rather than quantity. "It's high time that the realm of social media was shaken up by an even more draconian attempt to increase the quality of our online interactions by putting hard boundaries around them," Mims writes.

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